Entropy Growth and the Dark Energy Equation of State

Abstract

We revisit the conjecture of a generalized second law of thermodynamics which states that the combined entropy of matter and horizons must grow. In an expanding universe a generalized second law restricts the equation of state. In particular, it conflicts with long phases of a phantom, w<-1, equation of state.

8 pages, 4 figures, Contribution to the QUARKS 2006 conference in St. Petersburg

Cited by in corpus (1)

• Thermodynamics in $f(R)$ gravity in the Palatini formalism